Diving The FM style synths are nice, Its nice to hear them used as so many tend to avoid FM tones as their OSC of choice. The atmospheric bridges are quite well arranged. To me it sounds like your going for the game music approach which this would work wonderfully for. Its balanced and not to cluttered which makes it safe for having in game action sounds over top.
If however your going for the stand alone track approach it works good for that too. If I had a recommendation bring the lead line up a bit and don't be afraid to let it fly outside the strict 4 bar phrase pattern. Let it climb let it soar. . its great either way though. I wont critique your mix too much cause I'm using cheap headphones. Ill assume its good. . .